Thanks David. Big help, problem solved.
Regards,
Utkarsh
-------- Original Message --------
Subject: Re: [R] calling "exists" function inside
another function is not working
From: David Winsemius <dwinsem...@comcast.net>
To: utkarshsinghal
<utkarsh.sing...@global-analytics.com>
Cc: r help <r-help@r-project.org>, Utkarsh Singhal
<utkarsh....@gmail.com>
Date: Sat 14 May 2011 04:00:01 PM IST
On May 14, 2011, at 3:30 AM, utkarshsinghal wrote:
Hi all,
I want to define a function such that one of its argument if passed do
one
thing and if not passed do the second thing.
?missing
So basically, I have to check
whether the argument is passed or not inside the function. I am trying to
use 'exists' function to do this.
f = function(a,b){exists("b")}
f(a=3, b=4)
[1] TRUE
This is working as expected.
But if I do the following:
f(a=3)
[1] TRUE
Can anybody explain why this function is returning TRUE here.
--
Many thanks,
Utkarsh
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David Winsemius, MD
West Hartford, CT
______________________________________________
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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
